ADCv3 and example.

1 files changed, 100 insertions, 0 deletions

diff --git a/examples/stm32l4/src/bin/adc.rs b/examples/stm32l4/src/bin/adc.rs
new file mode 100644
index 000000000..fe97fb0b1
--- /dev/null
+++ b/examples/stm32l4/src/bin/adc.rs
@@ -0,0 +1,100 @@
+#![no_std]
+#![no_main]
+#![feature(trait_alias)]
+#![feature(min_type_alias_impl_trait)]
+#![feature(impl_trait_in_bindings)]
+#![feature(type_alias_impl_trait)]
+
+#[path = "../example_common.rs"]
+mod example_common;
+
+use embassy_stm32::gpio::{Input, Level, NoPin, Output, Pull};
+use embedded_hal::digital::v2::{InputPin, OutputPin};
+use example_common::*;
+
+use cortex_m_rt::entry;
+//use stm32f4::stm32f429 as pac;
+use cortex_m::delay::Delay;
+use embassy_stm32::adc::{Adc, Resolution};
+use embassy_stm32::dac::{Channel, Dac, Value};
+use embassy_stm32::spi::{ByteOrder, Config, Spi, MODE_0};
+use embassy_stm32::time::Hertz;
+use embedded_hal::blocking::spi::Transfer;
+use micromath::F32Ext;
+use stm32l4::stm32l4x5 as pac;
+use stm32l4xx_hal::gpio::PA4;
+use stm32l4xx_hal::rcc::PllSource;
+use stm32l4xx_hal::{prelude::*, rcc};
+
+#[entry]
+fn main() -> ! {
+    info!("Hello World, dude!");
+    //let pp = pac::Peripherals::take().unwrap();
+    let cp = cortex_m::Peripherals::take().unwrap();
+    let pp = stm32l4xx_hal::stm32::Peripherals::take().unwrap();
+    let mut flash = pp.FLASH.constrain();
+    let mut rcc = pp.RCC.constrain();
+    let mut pwr = pp.PWR.constrain(&mut rcc.apb1r1);
+
+    let mut delay = Delay::new(cp.SYST, 80_000_000);
+
+    // TRY the other clock configuration
+    // let clocks = rcc.cfgr.freeze(&mut flash.acr);
+    let clocks = rcc
+        .cfgr
+        .sysclk(80.mhz())
+        .pclk1(80.mhz())
+        .pclk2(80.mhz())
+        .pll_source(PllSource::HSI16)
+        .freeze(&mut flash.acr, &mut pwr);
+
+    let pp = unsafe { pac::Peripherals::steal() };
+
+    pp.RCC.ccipr.modify(|_, w| {
+        unsafe {
+            w.adcsel().bits(0b11);
+        }
+        w
+    });
+
+    pp.DBGMCU.cr.modify(|_, w| {
+        w.dbg_sleep().set_bit();
+        w.dbg_standby().set_bit();
+        w.dbg_stop().set_bit()
+    });
+
+    pp.RCC.ahb2enr.modify(|_, w| {
+        w.adcen().set_bit();
+        w.gpioaen().set_bit();
+        w.gpioben().set_bit();
+        w.gpiocen().set_bit();
+        w.gpioden().set_bit();
+        w.gpioeen().set_bit();
+        w.gpiofen().set_bit();
+        w
+    });
+
+    let p = embassy_stm32::init(Default::default());
+
+    let (mut adc, mut delay) = Adc::new(p.ADC1, delay);
+    //adc.enable_vref();
+    adc.set_resolution(Resolution::EightBit);
+    let mut channel = p.PC0;
+
+    loop {
+        let v = adc.read(&mut channel);
+        info!("--> {}", v);
+    }
+}
+
+fn to_sine_wave(v: u8) -> u8 {
+    if v >= 128 {
+        // top half
+        let r = 3.14 * ((v - 128) as f32 / 128.0);
+        (r.sin() * 128.0 + 127.0) as u8
+    } else {
+        // bottom half
+        let r = 3.14 + 3.14 * (v as f32 / 128.0);
+        (r.sin() * 128.0 + 127.0) as u8
+    }
+}